Strawberries, unlike picking bananas that are green and can be ripened artificially, must be picked when they are fully ripe, and they remain at peak flavor for only four or five days after that.
(A) Strawberries, unlike picking bananas that are green and can be ripened artificially, must be picked
(B) Picking strawberries, unlike with green bananas that can be ripened artificially, must be done
(C) Unlike bananas, which can be picked green and ripened artificially, strawberries must be picked
(D) Unlike with green bananas, which can be picked and ripened artificially, strawberry picking must be done
(E) Unlike picking bananas, strawberries cannot be picked green and ripened artificially, but must be picked
The answer is very obvious - C.
I have question about what "that" refers to. It doesn't seem to refer to any explicitly stated noun (phrase) but the "when" clause. I thought that in GMAT, a pronoun cannot refer to a clause.